Grabbing his ponytail, Shirley gave it a yank.雪莉抓住他的马尾辫,猛地一拽。He tried to yank his mind back out of fantasy.他试图将思绪从想入非非的幻梦中拉回.She gave the rope a yank.她猛拉了一下绳子....
血管周围细胞的营养不足,引起外膜的变性.Inadequate cell nutrition around vessels causes degeneration of tunica adventitia.假性动脉瘤一词用于只有一层动脉外膜的动脉瘤.A false aneurysm is the term applied when only the adventitia is present.心脏的外表面是由另一层结缔组织, 即心外膜所覆...